Wide box with white strips

Very, very simple site for a musical artist.
I wanted something different for a background. Wide box with a bg from stock Xara catalogue.
I ended up with white stripes indicating the margins of the page, and I’d like to get rid of them.
Enclosed is a screen shot of the gallery made from Xara. Many thanks,
-Bill

Bill, try making the page background transparent.

It's not clear which widget you are using. Possibly the Xara Slideshow widget?

Acorn

Thanks Acorn. I’ll do that. I use wide boxes exclusively on this site so no problem. Correct on the widget used.